Hampstead, Ontario -- Ten migrant farm workers from Peru were killed when a flat bed hit a passenger van in rural Canada on Monday afternoon, police and the workers' employer said. The truck driver also was killed.

Three other passengers were critically injured, The Globe and Mail reported.

The crash, the deadliest in Ontario since 1999, will leave at least 10 families in another country without a breadwinner, according to the Globe and Mail.

Police said one survivor was airlifted to a hospital with life-threatening injuries, and two others were seriously injured.

"On behalf of 13 million Ontarians, I want to offer our deepest condolences to those who lost a loved one and to offer our most sincere prayers for those taken to hospital," Premier Dalton McGuinty said in a statement.

No names of the victims have been released. Albert Burgers, who owns the farm where the workers were Monday before the crash, said some had been with his crew for more than 10 years.

Police told the CEO of the truck company, Speedy Transport, that the van apparently went through a stop sign and was hit by the truck.

The impact sent the van hurtling across a lawn before smashing into a house. The van's passenger side was nearly ripped off.

"I've been on the job for 28 years and I've never seen anything like it," Inspector Steve Porter told the newspaper as he stood near the scene after dark.

The Associated contributed to this report.